The obesity-associated FTO gene encodes a 2-oxoglutarate-dependent nucleic acid demethylase.

The obesity-associated FTO gene encodes a 2-oxoglutarate-dependent nucleic acid demethylase.
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DOI:
10.1126/science.1151710
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发表时间:
2007-11-30
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Schofield CJ
Schofield CJ
中科院分区:
其他
文献类型:
--
作者:
Gerken T;Girard CA;Tung YC;Webby CJ;Saudek V;Hewitson KS;Yeo GS;McDonough MA;Cunliffe S;McNeill LA;Galvanovskis J;Rorsman P;Robins P;Prieur X;Coll AP;Ma M;Jovanovic Z;Farooqi IS;Sedgwick B;Barroso I;Lindahl T;Ponting CP;Ashcroft FM;O'Rahilly S;Schofield CJ

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FTO(脂肪量和肥胖相关)基因的变异与人类体重指数增加有关。在这里,我们通过生物信息学分析表明,FTO与Fe(II)和2-酮戊二酸依赖性加氧酶共享序列基序。我们发现,重组鼠Fto催化Fe(II)和2 OG依赖的单链DNA中的3-甲基胸腺嘧啶的去甲基化,伴随产生琥珀酸,甲醛和二氧化碳。与核酸去甲基化的潜在作用一致,Fto定位于转染细胞的细胞核。对野生型小鼠的研究表明,Fto信使RNA(mRNA)在大脑中最丰富,特别是在控制能量平衡的下丘脑核中,并且弓状核中的Fto mRNA水平受进食和禁食的调节。研究现在可以直接确定生理相关的FTO底物以及核酸甲基化状态如何与脂肪量增加相关。
Variants in the FTO (fat mass and obesity associated) gene are associated with increased body mass index in humans. Here, we show by bioinformatics analysis that FTO shares sequence motifs with Fe(II)- and 2-oxoglutarate–dependent oxygenases. We find that recombinant murine Fto catalyzes the Fe(II)- and 2OG-dependent demethylation of 3-methylthymine in single-stranded DNA, with concomitant production of succinate, formaldehyde, and carbon dioxide. Consistent with a potential role in nucleic acid demethylation, Fto localizes to the nucleus in transfected cells. Studies of wild-type mice indicate that Fto messenger RNA (mRNA) is most abundant in the brain, particularly in hypothalamic nuclei governing energy balance, and that Fto mRNA levels in the arcuate nucleus are regulated by feeding and fasting. Studies can now be directed toward determining the physiologically relevant FTO substrate and how nucleic acid methylation status is linked to increased fat mass.
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